<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script>
        var arr = [3,4,5];

        function bubbleSort(arr){
        for(var i = 0;i<arr.length-1;i++){
            for(var j = 0;j<arr.length-i-1;j++){
                if(arr[j]>arr[j+1]){
                    swap(j,j+1);
                }
            }
        }
        return arr;
    }

    function swap(i,j){
        var tmp = arr[i];
        arr[i] = arr[j];
        arr[j] = tmp;
    }
        
     console.log(bubbleSort(arr));
    </script>
</head>
<body>
    
</body>
</html>